MEPS is hilarious. Be sure not to let the "medical equipment operators" (as I like to call them) rush you through anything. Fully understand what is exected of you on each test, particularly for vision. I failed the depth perception test the first time like many others here have. I Met with an opthalmologist the next morning for a full eye exam... no problems. They will be pushing you through quickly, and they will not be behaving in a way that considers how important any one exam is for your future. Fully understand each test before you start, and take charge as necessary.
For those of you who have been to MEPs.. Many of my enlisted buddies say its a long, two day event. Does an officer candidate get any priority over the lines and what not? My buddies said they saw officer guys get bumped to the front, but I've heard mixed reviews.. Not that it's a big deal or anything, I'm just curious.
The most important part of the eye exam is to stay hydrated. I passed it the first time at MEPS, OCS, and in API... You will have little sleep and you will be stressed those first couple of days at ocs. Hydration is the key for those tests, not really magic books. Depth perception is something you have or you don't...it's not a perishable skill. I never looked at one of those. But prior to meps I got a good nights sleep and drank tons of water. At ocs the night before medical day I drank like 3 canteens of water just before I went to bed.
Hydration is the key theme here obviously and lack of it can significantly impair your vision.